Django的接入子模型洋场

Question

我有两个型号，我已经创造了Parent和Child model.My在线表单集CRUD的直列FORMSET CRUD工作fine.But问题是，我不能即Parent和Child显示模板中“父列表视图”中的Child字段数据。我所做的是，我使用@property来获取Child模型数据，但似乎不起作用。

我的django template可能存在问题，同时显示更高级别的数据，或者可能是写在Parent模型中的问题。

经过漫长的调查，无法弄清楚问题。数据未显示。

我Parent型号：

class Parent(AbstractBaseModel): 

""" 
Defining the facets header that will be used during search. 
""" 

validators = [ChainIntegrityValidator, ScreenMethodValidator] 


chain = models.ForeignKey(
     'customers.Chain', 
     verbose_name=_('chain') 
    ) 
product_group = models.ForeignKey(
    'products.ProductGroup', 
    help_text=_('The product group in which the parent belongs'), 
    verbose_name=_('product group') 
    ) 
price = models.BooleanField(
    default=False, 
    help_text=_("Identifies whether the 'price' will be included in search facets.\ 
     Default value false"), 
    verbose_name=_('price') 
    ) 
order_price = models.DecimalField(
    max_digits=10, 
    null=True,blank=True, 
    decimal_places=2, 
    help_text=_('Price of a order'), 
    verbose_name=_('order price') 
    ) 
monthly_fee = models.BooleanField(
    default=False, 
    help_text=_("Identifies whether the 'monthly_fee' will be included in search facets.\ 
     Default value false"), 
    verbose_name=_('monthly fee') 
    ) 
order_monthly_fee = models.IntegerField(
    null=True,blank=True, 
    help_text=_('Sorting order of monthly fee.'), 
    verbose_name=_('order monthly fee') 
    ) 




def screen_product_group(self): 
    if hasattr(self, 'product_group'): 
     try: 
      obj = Parent.objects.get(chain=self.chain, product_group__name=self.product_group) 
     except Parent.DoesNotExist: 
      obj = self 

     if obj != self: 
      return {'product_group': ['A facet header with this product_group already exists']} 

@property 
def child_attributes_name(self): 

    return ','.join([child.attribute.name for child in 
        self.child_set.all()]) 

class Meta: 
    app_label = 'search' 
    unique_together = ('chain', 'product_group') 
    index_together = [ 
     ['chain', 'product_group'] 
    ] 

和我Child型号：

class Child(AbstractBaseModel): 

""" 
Defining the facets lines that will be used during search. 
""" 

validators = [ChainIntegrityValidator, ScreenMethodValidator] 

chain = models.ForeignKey(
    'customers.Chain', 
    verbose_name=_('chain') 
    ) 
parent = models.ForeignKey(
    'search.Parent', 
    help_text=_('parent to which child belongs'), 
    verbose_name=_('parent') 
    ) 
attribute = models.ForeignKey(
    'products.Attribute', 
    help_text=_("attribute to which child belongs"), 
    verbose_name=_("attribute"), 
    ) 
order_attribute = models.IntegerField(
    null=True,blank=True, 
    help_text=_('Sorting order of attribute'), 
    verbose_name=_('order attribute') 
    ) 

class Meta: 
    app_label = 'search' 
    unique_together = ('chain','facet_header','attribute') 
    index_together = [ 
     ['chain','facet_header','attribute'] 
    ] 

def screen_chain(self): 
    if not hasattr(self, 'chain'): 
     self.chain = self.facet_header.chain 

，这是Attribute模型，它是foreig键Child。我想表明从 '属性' 的日期模式。

class Attribute(AbstractBaseModel): 


validators = [ScreenMethodValidator, ChainIntegrityValidator] 


attribute_group = models.ForeignKey(AttributeGroup, related_name='attributes') 
name = models.CharField(max_length=128, 
         verbose_name=_('name'), 
         help_text=_('Enter Name')) 
code = models.SlugField(
    verbose_name=_('Code'), 
    help_text=_('Enter Code'), 
    max_length=128,) 

class Meta: 
    app_label = 'products' 
    ordering = ['attribute_group', 'code'] 
    unique_together = ('attribute_group', 'code') 
    verbose_name = _('Attribute') 
    verbose_name_plural = _('Attributes') 

这，我想以显示“属性”模型的数据是在Child模型外键的HTML模板。

{% for data in object_list %} 
        <tr class="gradeX"> 
         <td class="hidden-xs">{{ data.product_group }} </td> 

         <td class="hidden-xs">{{ data.price }}</td> 
         <td class="hidden-xs">{{ data.order_price }}</td> 
         <td class="hidden-xs">{{ data.monthly_fee }}</td> 
         <td class="hidden-xs">{{ data.order_monthly_fee }}</td> 


         <td class="hidden-xs"> 
          <dl class="dl-horizontal"> 
           {% for child in data.child_set.all.all %} 
            <dt>{{ child.attribute.attribute_group.name }}</dt> 
            <dd>{{ child.attribute.name }}</dd> 
           {% endfor %} 
          </dl> 
         </td> 

       {% endfor %} 

更新：

class FacetsList(WammuListView): 
    template_name = 'dashboard/parent_list.html' 
    model = Parent 

def get_queryset(self): 
    chain = Chain.objects.filter(id=self.kwargs['chain_pk']) 
    return Parent.objects.filter(chain=chain) 

Answer 1

模板

你有

{% for child in data.child_set.all.all %} 

第二。所有可能导致该问题，child_set是一个查询和设置。所有应足够。